#include"syscfg.h"
#include "stm32f4xx.h"

void syscfg_init()
{
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//kaiqishizhong
	SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOI, EXTI_PinSource5);//
}
 